Lubricator pump



L. C. ROTTER ET AL LUBRICATOR PUMP Nov. 3, '1953 Filed April 28, 1950 'MJ um.

Patented Nov. 3, 1953 STATES ICI-2g 2,657,763. I-.UBRIG'ATOE PUMP cumin. o., Retter and. vietor.- G.. Klein, st. Louis..

M11., assignons to, Lincoln Engineering` Gom.- lpany, St.-LuisMo., a corporationof Missouri appiieatiomxprirzs, 1950, serial No; 1:58:652

Thisinvention relates.to;lubricatorpumpseand with regard to certain more; speci'c; features, to such pumpsfor supplying; lubricator injector-sys:- tems.

AmongA the several objects, of the. invention may, bet noted; the provision of: a. lubricating'pump embodying a. simplied priming and. pressure relief meansfor priming and; by means of singlestitokeoperation rendering; operative;v an attached injector system.; and the pmvi's-ion of; ai pump of the class described adapted for kconvenient mountingfand. operation.v Other objectswill be in part apparent and in:- l3!art pointed out hereinafter.

The invention.' accordingly comprises the elementsvancl combinationscf elements, features of construction,` andqarrangements or parts Which willY be exemplified.- in` the structures hereinafter described, and thev scope oithe.n applicationof which will be indicated in thefollowing claimt Inthe accompanying drawings, infwfhich. one of variouspos'sible ernbodimentsof the invention is illustrated,

Fig. l is alongitudinalcross.sectionof appara.- tus embodying our invention; y

Fig. 21 is a cross section. taken on line 2'-2` of Fig. 11; and..

Fig. Sis a vertical. section taken on line 3-3 0f Fig. 2.

Similar. reference. characters indicate corre.- sponding parts throughoutv thev severalv views4 of the drawings.

The present .invention provides asimpl" pump for use in connection with. lubricator injector systems, oa nature designedltoV make. such sys.; tems more practically applicableto ordinary'shop equipment'. To this end; theY apparatus is made as simple and` compact as possible, priming` and pumping operations being coordinatedffor easeof operation, and complete injection operation. be,- ingeffectedwith a single stroke.

Referringr novvy moreY particularly to the. draw.- ings there'is shown at numeral I aliibricantcontaining barrel Which is threaded into an upper head 3, the latter bieingiormedwith ka supporting padiShaving. openings 'Ifor vertically locating the device on, some4 vertical wally or panel. Threaded'to the lowerl end of .the b'arrell isa lower head enclosure 9;

The upper head 3.f0rms. .a bushing II" forv a. i

l Claim. (Cl. 184-28),

Il is provided with an operating handle: 23' which,

' ify oscilla-tediin avertical plane such as showniby.L

the arrow in' Fig; 1, will reciprocate theY push rod' I3. f

Atitsy lower endthe pus-h rodl If'3,eng'ages the ball end 25f of af plunger 2J; A= flange 2941s threaded4` to the1 upper` endf ofthe: plunger.` I-f, under which; bearsi the upper` en'df of a conical compression spring 31:. The 1owe1` endv of the spring Slseatsfinthelower capfSE Afpumpicylim der 33 bylv means of"` a threaded .ring 351 is" held in an; opening inrtheA cap 9: This cylinder :tiel/ias inletports SFF adapted; to.; be closed upoirv down Ward advance of the plunger 2l. Sur-rounding the' ports" 3l: is; astrainer 39. 'Ihreadedv tol the lowerv outletv of the cylinder: 313i is a: nozzle 4I.; iihefoutlet opening; oftheA cylinderisf formed asa valve seat 4-3f forseating? a compoundn or double check` valve assembly ;A The' assembly. 45e is biased' to theseat'V 48 by:y means` of aspiring. 41 positioned in the nozzle: 4I(` 'llhef nozzle" isprofvided'I with'` a' supply' line: 49.1 which leads to the' injector mechanisms i tol bery served? by. the present pump. For'. examplefteen' feetiofflin'e may, serve fifteenor so injectors'.

'Ilhef compoundA check. valvev assembly" 45 come prises' an annular plug@ 51;. axially,I grooved' or atted onvv its@ outside asf shown.' at 53:" t'o provide for'. passagesthereby ofclubricant vwhen thefplugi is foroedlfromathetseatsfa. 'Ihefopening-55 through .thee plug 5I.: has anouter; on downstream: seatt 5l for a bailrcheckvalveal Aispring SIibisses the ball cheelcivalve ftortheseatl 5.11m aVVAA downstream directionv .opposite4 to"theupstreamibiasioff spring 41' onmember.` 5Iv againstzseatzi 'I'l'e spring-:Bil reacts from`r an inturnedshoulder'of the open@ ing-.55:y Afilling;screw#plugisgprovidedatw. At Irl? is a guide bushings for a1 sliding: rod: 69E threaded'atits lower end int'oa' float T'I; Atlits upperA end,` the rod"V 69 carries-i anl indicator T3? whichl isI movable under-1' a transparent cap "[572 Tli'ef indicator* 'l'aflsh'ows'l the' level in tlie cylinder I reaches a point at which refillingfisrequired Operation is as44 follows Lubricant which inthepresent-*caseis prefere abiyof trie'Alici-iidl varietyis introduced into the lubricantcontaining b'arr'el'- until` it f is flll y 'Ihevv indicator. IBF- is a sifnal indicati-ngiv tlielicguid' in the; lubricatorr-containing barrel? should? bef"- replenished: to."v avoidair enteringi the system: The linefs'is. attachedztorthe vinjectorslisecvediuythea apparatus.V The injector-'sr require' no detailed. description;` excepti to; statefthatf they aremfzthe varietyinwhichaecertamipressureds required in their supply line in order that they will force out a measured charge of lubricant to a bearing or bearings. After they have discharged, it is necessary, in order that they may reset themselves and refill from the same supply line, that the supply line be vented to a lower pressure. A typical injector system of the type referred to herein is shown in United States Patent 2,448,583. The volume of discharge upon a single stroke of plunger 2| is adapted to supply the simultaneous discharge of, say fifteen injectors through fifteen feet of line 49, at a pressure of, say 600 to 1,000 p. s. i.

It is also necessary that the supply line be properly primed when operations are started. Supply line at greatest distance from gun should be open to allow air to escape when initially priming. It will be understood that priming of a line and of injectors can be accomplished at pressures lower than those required to operate the injectors. Thus the substantial volume required for initial priming of the system may be obtained by repeatedly oscillating the handle 23. However. after the system has been primed, a single stroke of the handle is suillcient to increase the pressure to the upper value and to supply the amount of lubricant required for one operation of each of the injectors. The release pressure in line 49 required to cause the injectors to return to their initial (filled) positions is about 150 p. s. i. or so. The pressure at which Valve 59 is set to release is about 50 p. s. i. and will open when this pressure or more exists as a differential pressure across it.

All that is required for injection is to oscillate the lever 23. Obviously this will reciprocate the plunger 21, which in its initial few strokes supplies sufficient lubricant to prime the line, if this has not already been primed. During this reciprocation the check valve member 5|, since it opens downstream, unseats to pass lubricant. The ball check valve 59 does not unseat, since it closes downstream, unless the pressure exceeds p. s. i. when ports 31 are open. Finally, pressure is reached at which the injectors will operate. This is a pressure higher than the one which will unseat the check valve 59, but this valve will not open when the lower end of the plunger 21 is below the ports 31. This is because of the balanced pressure on opposite sides of this valve 59 under these conditions. Finally the injectors operate. When the injectors have operated, the handle 23 may be returned to return the plunger 21 to retracted position opening the ports 31. Immediately the check valve 5| seats, but the check valve 59 will open, it being set to release at a pressure lower than the operating pressure for the injectors. Thus the line connected with outlet 49 is vented back to the cylinder I through the ports 31. This allows the injectors to recharge in a manner which in view of said patent it is not necessary to detail herein.

After the first operation including priming the system is ready for the next use upon a single stroke. It will be understood that the line 49 will not vent below the predetermined pressure set by the check valve 59, so that normally, if the line is not leaking, it will maintain its prime ready for subsequent single-stroke operations. Thus a single pull on the lever 23 is ordinarily sufllcient to effect a discharge by the injectors. If prime has been lost several strokes may be necessary, as in initial starting. Without loss of prime a single stroke is sufficient because as 4 stated the volumetric displacement of plunger 21 in the cylinder 33 is great enough to supply through the line an amount of lubricant equivalent to the total amount of lubricant supplied by all injectors. v

'I'hus a typical release pressure for the valve 59 is 50 p. s. i. and typical pressure that may be obtained in the outlet 49 for a single stroke of the plunger 21 is 600-1,000 p. s. i., assuming fteen or twenty small injectors and a 15-foot copper line to them. The injectors will recharge at about 200 p. s. i. or less release pressure, which assures opening of the valve 59. Thus it will be seen that after the line and the injectors have been initially primed, a single stroke of the plunger 21 is suiiicient to supply the injectors and to build a pressure up to 600-1,000 p, s. i.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained. The present construction provides for a compact, troubleproof and convenient arrangement for obtaining initial prime and for venting the supply line after a one-stroke injection operation thereafter.

As many changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

Lubricating apparatus for single-stroke pumping of lubricant through an injector supply line to a plurality of injectors, comprising a lubricant container consisting of a barrel having end heads, one of said heads having means at one side for attachment of the container in vertical position on a support with said one head up, said one head having an opening for filling the container with lubricant, a pump cylinder fixed in an opening in the other and lower head extending axially of the barrel and having a radial inlet port in the portion thereof within the barrel, a plunger reciprocable in the cylinder, being movable downward through a pressure stroke from a retracted position upward of the port, and crossing the port in making the pressure stroke, a nozzle xed on the outer end of the pump cylinder outside the barrel and adapted for connection of a lubricant line for supplying lubricant under injector-operating pressure to injectors, the cylinder, at its outer end, presenting an outwardly directed valve seat, an outlet check valve slidable in said nozzie, a spring in said nozzle biasing said check valve toward said seat, said check valve having a vent port extending axially therethrough, an inwardly directed valve seat at the outer end of' the vent port. a vent valve in said vent port biased toward said inwardly directed valve seat by a spring in said vent port, a push rod axially slidable in an opening in the upper head of the barrel and engaging the upper end of the plunger for driving the plunger through a pressure stroke, a spring in the barrel biasing the plunger in return direction, and means for operating the push rod comprising an elongate handle pin-connected at one end to the upper end of the push rod and articulated by a link to the upper end head and having a retracted position extending down alongside the container, said handle, upon being swung upward and away from the container, driving the push rod downward to drive the plunger through a pressure stroke, said vent valve opening to vent the nozzle to the barrel via the radial inlet port when the plunger returns to re- 5 tracted position after a pressure stroke, the rela.- Number tion of the spring in the nozzle and the spring in 1,795,034 the vent port being such that the vent valve 1,877,124 opens at a lower pressure than the check valve. 1,915,443 LUTWIN C. ROTTER. 5 1,967,707 VICTOR G. KLEIN. 2,082,521

References Cited in the me of this patent UNITED STATES PA'I'ENTS Nurgezrw Number Name Date 10 Zabriskie Oct. 2, 1928 Name Date Murphy Mar. 3, 1931 Cutts Sept. 13, 1932 Pelouch June 29, 1933 Davis July 24, 1934 Schneider June 1, 1937 FOREIGN PATENTS Country Date Germany Nov. 8, 1899 

